Rolling-mill.



Patented Apr. I6, l90l.

E. TRUXALL.

ROLLING MILL.

(Application filed Jan. 9, 1901.)

(No Model.)

INVENTOR WITNESSES Mir/W1 arrnn Starts n'rnrvr Gretna EPHRAIM TRUXALL, OF PITTSBURG, PENNSYLVANIA.

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SPECIFICATION forming part of Letters Patent No. 672,245, dated April 16, 190i.

Application filed. January 9 1901.. derial No. 42,651. (No modeld To all whom it may concern:

Be it known that I, EPHRAIM TRUXALL, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and usefuLRollingdl/Iill, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a front elevation, partly broken away, showing my invention as applied to the finishing-train of a hoop-rolling mill. Fig. 2 is an end elevation, partly in section; and Fig. 3 is a diagrammatic view of the driving connections.

My invention relates to that class of rolling-mills, such as hoop mills, wherein the top roll is usually driven by its frictional contact with the metal being rolled; and its objects are to prevent the burning of this upper roll, which occurs when the entering end of the metal sticks in the rolls, and to avoid the injury and destruction of the roll which now frequently happens from this cause, and, further, to allow slipping of a frictionally-driven roll and allow for rolls of different diameters.

In the drawings, A represents a finishing stand of rolls, shown as adapted for rolling hoop-iron and consisting of a lower roll 2 and an upper roll 3. The lower roll is positively driven from shaft 4 by wabbler connections 5, a portion of which is broken away in the drawings, as the same is old and well known. The upper roll 3 is driven by exterior friction connections, which will actuate it independently of the friction between it and the lower roll or between it and the metal being rolled and which further allow a slipping of the roll to allow of its surface speed being the same as the surface speed of the lower roll. In the form shown I accomplish this result by belt connections. Thus a belt 6 leads from'a pulley portion on the driving-shaft 4 to a pulley 7 on an upper counter-shaft, which is also provided with a pulley 8, from which a driving-belt 9 extends over a pulley 10 on the driving-shaft 11, having wabbler connection 12 with the shaft of the upper roll. The belt 6 is crossed, so as to give proper direction of rotation to the upper roll, and the upper roll is thus driven by connections which allow a slip where the upper roll differs in diameter from the lower roll.

In order to adjust the spindle 11, I provide end bearin gs 13 therefor, made in two parts,th'e lower part being supported upon spiral spring 14., while the upper part is moved up and down positively by shaft 15, having right and left hand screw-threads, with an intermediate squared portion, as shown in Fig. 2. As the upper roll wears smaller in use the bearings for the driving'spindle 11 may be moved down to correspond, giving additional tension to the connecting-belt 9.

In the operation of the device the metal is passed through the rolls in the usual manner and the upper roll is driven by its exterior belt connections, which will allow slip and at the same time prevent any sticking of the entering end of the piece. The burning of the rolls is thus avoided, and at the same time the diameter of the rolls may be dilferent from each other without causing injury thereto.

Many variations may be made in the form and arrangement of the connections for driving the rolls, and the invention may be applied to stands containing two or more rolls, since I consider myself the first to drive a roll by exterior friction connections, such as belts, which allow slipping.

I claim 1. In a rollinganill, a pair of rolls arranged to receive the metal between them, a positive driving connection for the lower roll, and belt-driving connections from the driving mechanism of the lower roll through a counter-shaft to the upper roll; substantially as described.

2. In a rolling-mill, a pair of rolls arranged to receive the metal between them, a driven shaft having a positive connection with the lower roll, and connected to a counter-shaft which is connected to the upper roll, at least one of the connections for the upper roll consisting of a friction-belt; substantially as described.

3. A two-high rolling-mill having a drivingshaft positively connected to the lower roll, a counter-shaft having a belt connection with said driving-shaft, and belt connection from 0 the counter-shaft to the driving mechanism and the shaft for driving the upper roll; subof the upper roll; substantially as described. stantially as described. 10'

4. A two-high mill having a driving-shaft In testimony whereof I have hereunto set for the lower roll, positively connected with my hand.

the lower roll, a housing separate from the EPHRAIM TRUXALL. roll-housing, and a counter-shaft within the Witnesses:

separate housing and having belt connections 0. P. BYRNES,

with both the driving-shaft for the lower roll H. M. CORWIN. 

